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Frequently Bought Together

Frequently Bought Together

Product Overview

Ready-to-use formula, no mixing required

Dries to red color, and is paintable

Ideal for sealing in fire-rated construction

Use 3M 10.1 fl. oz. Fire-Barrier Caulk to guard against damage from fire, smoke and toxic gasses. This latex sealant withstands flames for up to 4 hours and expands when exposed to heat. Dries to red color, no mixing required.

Excellent adhesion

No-sag, non-halogen formula

Paintable

Protects against fire for up to 4 hours

Expands when exposed to heat to protect against smoke and toxic gasses

Product Overview

Ready-to-use formula, no mixing required

Dries to red color, and is paintable

Ideal for sealing in fire-rated construction

Model #:CP25WB+10

Sku #:163096

Internet #:100166701

Use 3M 10.1 fl. oz. Fire-Barrier Caulk to guard against damage from fire, smoke and toxic gasses. This latex sealant withstands flames for up to 4 hours and expands when exposed to heat. Dries to red color, no mixing required.

Excellent adhesion

No-sag, non-halogen formula

Paintable

Protects against fire for up to 4 hours

Expands when exposed to heat to protect against smoke and toxic gasses

Warranty / Certifications

Questions & Answers

Hi. Can this be used on the pipe that leads to radiators? I have a few small gaps I need to fill.

Hi. Can this be used on the pipe that leads to radiators? I have a few small gaps I need to fill.

Asked by: Ray

Yes, it will shrink after drying from the heat, and need a 2nd application.

Answered by: MrB

Date published: 2018-01-08

Can it be used to seal crack between fire rated gypsum board and wood stud l in the firewall? Wil...

Can it be used to seal crack between fire rated gypsum board and wood stud l in the firewall? Will it stick good to both drywall and wood stud?

Asked by: Lena

It can stick to anything. To maintain a smoke barrier it can seal any crack between any surface. In a fire rated assembly it can seal a gap between drywall and any non flammable item. In this assembly exposed wood needs to be covered with fire rated drywall and then any gaps can be sealed with this product

Answered by: JohnnyBucket

Date published: 2018-06-09

At what temperature does this product start to expand? (Says it will expand when exposed to heat)

Asked by: DIYdude

It will expand to 3 times it&rsquo;s dried volume at temperatures above 1000 degrees F.
That&rsquo;s according to the spec sheet that can be accessed on this web site.

Answered by: Soldiertoe

Date published: 2018-11-19

Can this be used to fill the butted sheets of fire rated drywall on a commercial firewall?

Can this be used to fill the butted sheets of fire rated drywall on a commercial firewall?

Customer Reviews

Rated 5 out of
5 by
HomeDepotCustomer from
Great product...Great product

Date published: 2018-10-17

Rated 5 out of
5 by
BigDD from
I am rating this a 5 based on the condition of adhesion, cohesion and general ease of application...I am rating this a 5 based on the condition of adhesion, cohesion and general ease of application with which the product was intended. I filled around electrical wiring and schedule-40 pipe. It adheres to all surfaces - wood as well. It's consistency keeps it from slumping and falling out of the openings in which it is placed. However, I did take a piece of wood to mash the product into place in difficult to reach or deep areas. I was also able to build up the product for larger deeper openings. The cured product results in a firm but somewhat flexible filler. One frustrating note with this product was that when the pressure was released from the caulking gun plunger the caulking continued to run out. Leaving pressure on the gun plunger is not advised unless you want a generous, and expensive, pile of caulk wherever you set down the gun.

Date published: 2018-09-19

Rated 5 out of
5 by
Steph from
Worked great! We are building a new home and used...Worked great! We are building a new home and used this as we needed to have it per inspection. Worked great!

Date published: 2018-09-18

Rated 2 out of
5 by
HomeDepotCustomer from
Very runny ...Very runny

Date published: 2018-09-12

Rated 5 out of
5 by
Meee from
I was able to stuff this caulk in all the holes well. Great !I was able to stuff this caulk in all the holes well. Great !

Date published: 2018-09-07

Rated 5 out of
5 by
Dennis from
Did what I needed it to do and passed building inspection.Did what I needed it to do and passed building inspection.

Date published: 2018-07-24

Rated 5 out of
5 by
Ant from
Great product, little pricey. You get what you pay for thoughGreat product, little pricey. You get what you pay for though

Date published: 2018-07-24

Rated 4 out of
5 by
Kat from
We use this product in our lab scale rocket engine testing. It really needs a cap after opening....We use this product in our lab scale rocket engine testing. It really needs a cap after opening. It dries out if not used at once. Putting a nail in opening leaves contaminates that pollute our use but helps to keep from drying out.